In undertaking this data collection, the principal
investigators sought to determine (1) whether police enforcement
against drug crimes, specifically heroin crimes, had any influence on
the rates of nondrug crimes, and (2) what effect intensive law
enforcement programs against drug dealers had on residents where those
programs were operating. To achieve these objectives, data on crime
rates for seven successive years were collected from police records of
30 cities in Massachusetts. Data were collected for the following
offenses: murder, rape, r... (more info)

In undertaking this data collection, the principal
investigators sought to determine (1) whether police enforcement
against drug crimes, specifically heroin crimes, had any influence on
the rates of nondrug crimes, and (2) what effect intensive law
enforcement programs against drug dealers had on residents where those
programs were operating. To achieve these objectives, data on crime
rates for seven successive years were collected from police records of
30 cities in Massachusetts. Data were collected for the following
offenses: murder, rape, robbery, assault, larceny, and automobile
theft. The investigators also interviewed a sample of residents from 3
of those 30 cities. Residents were queried about their opinions of the
most serious problem facing people today, their degree of concern about
being victims of crime, and their opinions of the effectiveness of law
enforcement agencies in handling drug problems.

Access Notes

The public-use data files in this collection are available for access by the general public.
Access does not require affiliation with an ICPSR member institution.

Universe:
Part 1: Thirty cities in Massachusetts during 1980-1986.
Parts 2-4: All residents in Massachusetts during 1986.

Data Types:
administrative records data,
survey data

Methodology

Sample:
A stratified random sample was used in Parts 2-4.

Data Source:

official police records and telephone interviews

Extent of Processing: ICPSR data undergo a confidentiality review and are altered when necessary to limit the risk of
disclosure. ICPSR also routinely creates ready-to-go data files along with setups in the major
statistical software formats as well as standard codebooks to accompany the data. In addition to
these procedures, ICPSR performed the following processing steps for this data collection:

Standardized missing values.

Version(s)

Original ICPSR Release:1992-01-10

Version History:

2006-03-30 File CB9667.ALL.PDF was removed from any previous datasets and flagged as a study-level file, so that it will accompany all downloads.

2005-11-04 On 2005-03-14 new files were added to one
or more datasets. These files included additional setup files as well
as one or more of the following: SAS program, SAS transport, SPSS portable,
and Stata system files. The metadata record was revised 2005-11-04 to
reflect these additions.

1998-09-17 SAS and SPSS data definition statements are now
available for this collection. Also, missing data codes have been
standardized, and data and documentation have been reformatted. In
addition, the codebook and data collection instrument are now
available as a PDF file.

Download Statistics

Located within ICPSR, NACJD is sponsored by the
Bureau of Justice Statistics, National Institute of Justice, and the Office
of Juvenile Justice and Delinquency Prevention

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Justice Statistics, the National Institute of Justice and the Office of Juvenile Justice and Delinquency Prevention of
the Office of Justice Programs, U.S. Department of Justice. Neither the U.S. Department of Justice nor any of its
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its content, technical infrastructure, and policies, and any services or tools provided).